University students build 3,421 mpg car

It’ll cost you about $400-$500 to fly from Miami to Seattle, but would you think about driving if you could make the trip for less than $2.50 --- the price of a gallon of gas?

You could, theoretically at least, if you used the winning car from the 2015 Shell Eco-Marathon Americas competition, where high schools and universities face off in high efficiency vehicles of their own design.